Crossword Genius

One drunk is concerning a flyer after takeoff? (4,3)

Ross

I believe the answer is:

real ale

I'm a little stuck... Click here to teach me more about this clue!

'one drunk is concerning a flyer' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'after takeoff?' is the wordplay.
I cannot really understand how this works, but
'after' could be 'ala' ('a la' - 'in the style of ' or 'after' in French) and 'ala' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for real ale that I've seen before include "Objective of campaign" , "The RA in CAMRA" , "CAMRA interest" , "Bitter, possibly" , "Cask-conditioned beer" .)

I've seen this clue in The Guardian.
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